Could really use some help updating to an AM5 platform for Zen 4 ;-)

Have you measured how hot it gets inside the enclosure? Any worries about the plastic melting or warping over time?

The bios lets me set fan speed based on temp and it generally runs quiet even watching 4K video. If I compile code on all 8 threads for over a minute it will speed up. The CPU should be the hottest part, and one of the bottom vents is near the SSD, which is on the bottom of the board I've got. The air coming out on any side is not generally very warm.

I think a good update could reduce the overall height by 5-6mm (10 percent). Being able to relocate the fan hole is critical to support different PCBs since CPU location is not standard.

Post doesn't seem to mention filament type but there are some very heat resistant filaments out.

It was done in PLA and does not get hot at all.